Hazards:
Bismuth Trichloride is toxic. Avoid exposure.
Conc. HCl is corrosive and toxic. Use care.
Chemicals and Solutions:
0.1 BiCl3
Concentrated HCl
Distilled water
Materials:
Large hydrometer with black tape
250 mL graduated cylinder
25 mL graduated cylinger
Stirring rod
Procedure:
Add 25 mL BiCl3into hydrometer.
Add 150 mL of water (white ppt forms)
Add 15 mL conc. HCl (dissolves ppt).
BiCl3 (aq) + H2O ↔ BiOCl(s) + HCl
Hint:
(This demo shows effectively the same principle as the cobalt equilibrium demo. The cobalt equilibrium demo shows principle with color rather than precipitate.)
To schedule a demonstration, please send an email to the demonstration lab.
Contact:
Eric Camp
Lecture Demonstration Technician
Bagley Hall 171
(206) 543-1606